OCR Gateway Biology - B2 by Harvinder Lewars

B2: understanding our environment

Classification

Classification systems

Evolutionary Trees

Species - A group of organisms that can interbreed to produce fertile offspring.

Binomial system

Pyramids of Biomass

Pyramids of Numbers

Energy Transfer

Energy Flow

Competition between organisms

Predator- prey Relationships

Parasitic relationships

Mutualistic Relationships

Adaptations

Specialists and Generalists

Extremophiles

Adaptations to cold environments

Counter - current heat exchange system

Adaptations to hot environments

Adaptations to dry environments (plants)

Adaptations to dry environments (animals)

Evolution: Natural Selection

Development of natural selection from new discoveries

Speciation

Controversial natural selection

Natural selection is accepted...

Lamarck's theory

The Carbon Cycle

Carbon in the sea

The Nitrogen Cycle (1)

The Nitrogen Cycle (2)

Human impact on the Environment

Global Warming

Acid Rain

Ozone Depletion

Indicator Species of Pollution

Measuring Pollution with indicator species

Advantages and disadvantages of methods to measure pollution.

Factors that lead to endangered species

Evaluating Conservation programmes

Benefits to Wildlife and Humans from conservation programmes

Sustainable Development

Examples of sustainable development

Case study; Whales (endangered)